you want to dress in layers and dress properly for the environment. >> is there a big difference in terms of elderly and young people in ways that tech really get sick and -- they can really get sick and suffer illness? >> definitely. older people have a decreased cold tolerance. they don't sense the cold as quickly as youngereople do. plus they have other health concerns as well that affect their ability to be warm and to remain warm in cold climates. they also take a lot of medications which can decrease their ability to stay warm, so they're definitely a high risk category as well as infants. infants really can't tell you when they're cold, and they have a decreased ability to tolerate cold, cold temperatures, so it's important to check on both of those extremes. >> i know you brought some props in to show us what we can do to protect ourselves. >> i did. grandma already taught us this, but maintaining a good diet and staying healthy includes lots of fruits and vegetables. you need to drink a lot of water as well, and people say, oh, why do i need to drink water? your skin gets very dr